* - AVK International

Enclosed shaft end, DN50-300

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AVK headquater in Skovby Galten, Denmark

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AVK International A/S

Bizonvej 1, Skovby, 8464 Galten, Denmark

Resilient seated swing check valve with enclosed shaft end. For drinking water and neutral liquids to max. 70°C

AVK series 41 swing check valves come with both metal and resilient seats. Installed in pumping applications to prevent back flow they can be used for drinking water as well as waste water. The disc is connected to the shaft via a flexible bush that allows disc and valve seat to adjust exactly. All interior parts are stainless steel or coated with drinking water approved epoxy or EPDM. The series 41 valves are available with either enclosed shaft end or protruding shaft end where a lever with a weight or a spring can be fitted to mitigate pressure surges.

Variant 41/61-003
Connection:	Flanged
Material:	Ductile Iron
DN:	DN50 - DN300
PN:	PN16

Features

Resilient seat provides a drop tight closure and due to the light weight it requires a minimum of force to open/close
Shaft fitted in the bonnet allowing for easy maintenance without removing valve from pipeline
Shaft material 1.4021 (AISI 420) stainless steel
Hinge in stainless steel for sizes ≤ DN 200; ductile iron coated with drinking water approved epoxy for larger
Bonnet gasket lying in a groove between bonnet and body prevents blow-out
All seals and coatings with contact to the fluid are approved for drinking water
250 µm fusion bonded epoxy coating
Disc is designed with a steel or ductile iron insert fully vulcanized with EPDM rubber
Bosses on each side of the valve seat allow for installation of pressure gauge, by-pass, etc.

Downloads

Datasheet

Appendix

Tender Text

Certificate(s)

Installation, Operation & Maintenance

Animation

AVK_swing_check_valve_animation.mp4

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AVK ref. no.	DN mm	Flange drilling	L mm	H3 mm	W mm	W1 mm	Theoretical weight/kg
41-050-61-018	50	PN10/16	200	197	165	191	12
41-065-61-018	65	PN10/16	240	222	185	191	15
41-080-61-018	80	PN10/16	260	230	200	191	17
41-100-61-018	100	PN10/16	300	255	220	212	21
41-125-61-018	125	PN10/16	350	341	250	273	40
41-150-61-018	150	PN10/16	400	348	285	273	42
41-200-61-008	200	PN10	500	412	340	323	67
41-200-61-018	200	PN16	500	412	340	323	67
41-250-61-008	250	PN10	600	568	405	606	183
41-250-61-018	250	PN16	600	568	405	606	186
41-300-61-008	300	PN10	700	643	460	606	197
41-300-61-018	300	PN16	700	643	460	606	196

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Components

1.	Nut	Stainless steel A4
2.	Bolt	Stainless steel A4
3.	Washer	Stainless steel A4
4.	Spacer	Polyamide
5.	Disc	Steel S235JR
6.	Washer	Stainless steel A2
7.	Bolt	Stainless steel A2
8.	Hinge	Stainless steel 316
9.	Bonnet gasket	EPDM rubber
10.	Key	Stainless steel A4
11.	Washer	Stainless steel A4
12.	Bolt	Stainless steel A4
13.	Body	Ductile iron GJS-500-7 (GGG-50)
14.	Bushing	Dezincification resistant brass
15.	O-ring	EPDM rubber
16.	O-ring	EPDM rubber
17.	Shaft	Stainless steel 420
18.	Bonnet	Ductile iron GJS-500-7 (GGG-50)